Stepper class

A material stepper widget that displays progress through a sequence of steps. Steppers are particularly useful in the case of forms where one step requires the completion of another one, or where multiple steps need to be completed in order to submit the whole form.

The widget is a flexible wrapper. A parent class should pass currentStep to this widget based on some logic triggered by the three callbacks that it provides.

See also:



Stepper({Key key, @required List<Step> steps, StepperType type: StepperType.vertical, int currentStep: 0, ValueChanged<int> onStepTapped, VoidCallback onStepContinue, VoidCallback onStepCancel })
Creates a stepper from a list of steps. [...]


currentStep int
The index into steps of the current step whose content is displayed.
onStepCancel VoidCallback
The callback called when the 'cancel' button is tapped. [...]
onStepContinue VoidCallback
The callback called when the 'continue' button is tapped. [...]
onStepTapped ValueChanged<int>
The callback called when a step is tapped, with its index passed as an argument.
steps List<Step>
The steps of the stepper whose titles, subtitles, icons always get shown. [...]
type StepperType
The type of stepper that determines the layout. In the case of StepperType.horizontal, the content of the current step is displayed underneath as opposed to the StepperType.vertical case where it is displayed in-between.
hashCode int
The hash code for this object. [...]
read-only, inherited
key Key
Controls how one widget replaces another widget in the tree. [...]
final, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited


createState() → _StepperState
Creates the mutable state for this widget at a given location in the tree. [...]
createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree. [...]
debugDescribeChildren() List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children. [...]
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
@pragma('vm:entry-point'), inherited
toDiagnosticsNode({String name, DiagnosticsTreeStyle style }) DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by toStringDeep. [...]
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this object.
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this node and its descendants. [...]
toStringShallow({String joiner: ', ', DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a one-line detailed description of the object. [...]
toStringShort() String
A short, textual description of this widget.


operator ==(dynamic other) bool
The equality operator. [...]